Table 4: The spectrum of Pediatric Obstructive Sleep-Disordered Breathing.

Primary snoring	Habitual snoring > 3 nights/week without apneas, hypopneas, frequent arousals, or gas exchange abnormalities (prevalence, 7.45%)
Upper airway resistance syndrome	Snoring, increased work of breathing, and frequent arousals without recognizable obstructive events or gas-exchange abnormalities
Obstructive hypoventilation	Snoring plus elevated end-expiratory carbon dioxide partial pressure in the absence of recognizable obstructive events
OSA syndrome	Recurrent events of partial complete upper airway obstruction (hypopneas, obstructive or mixed apneas) with disruption of normal oxygenation, ventilation, and sleep patterns (prevalence, 1% to 5%)

OSA = obstructive sleep apnea

Courtesy of Catherine Kier, MD, FAAP, FCCP, DABSM, AE-C of Stony Brook Children’s Hospital